Process for manufacturing of an elastic imitation hemp



UNITED STATES PATENT ojFF cE.

'roiuommi HONDA, 0F bNeAeuN, JAPAN, Assienonro HEIJIRO NISHIMURA, or"

' TOKYO, JAPAN.

PROCESS FOR MANUFACTURING OF AN ELASTIC IMITATION HEMP.

1,351 385. No Drawing.

To all whom it may concern:

Be it known that I, ToMo'r KE HONDA, subject of the Empire of Japan,residing at No. 1530, Orio Ongagun, Fukuoka, Japan,

have invented certain new and useful Imit consists in coating thematerial with a size or paste made from the roots of the.

hydrosme rivieri and then subjecting the coated cotton thread or cottoncloth; to tannic acid, and if desireda to a further treatment of sodiumstannate of sodium silicate.

The object of this invention is to give a hemp-like appearance and'highelasticity to the cotton thread or cotton cloth and also to give highresistance for washing, rubbing and sweat, that is to say, is to obtainan imitation hemp cheaply.

If a solution of tannic acid is added to a solution of size or pastemade from the roots of the hydrosme rivieri the paste so formed isconverted instantly'into'a white insoluble substance. The reaction is,very complete and no trace ofthe paste'remains in'the solution. Thiswhite precipitate is a special compound to be called tannin hydrosmerivieri and has a high elasticity and is not affected appreciablybyacids or other alkalis excepting sodium stannate or sodium silicate,by action of which the precipitate is rendered translucent.

- The above mentioned reaction is the origin,

ton thread is drawn passing firstly through a solution of hydrosmerivieri size, (if some weight is wanted, a suitable quantity of metalsalts, such as tin, antimony, aluminum or chromium may be added to thekonnyaku-i nori) and nextly through a 0.5-1.00 solution of tannic acidand then wound on a reel.

After the material has been woun d upon the reel, it is removed from thesame in a wet condition, dried,.when the insoluble tannin hydrosmerivieri is found among'the fiber.- .(If metal salt is added, the tanninmetal salt" is contained in the tannin hydrosme rivieri) -When dried itis washedwit'hfwae I i imitation hemp from cotton thread or cloth, I10

ter and dried again. p

By these treatments the nap on the material is laid down and inappearance re-' %-s'olution of ,sodium stannate or in a 1-3 solution ofSpecification of Letters Patent. Patented Aug. 31 1920 Application filedJuly 3, 1919. Serial No. 808,368.

sodium silicate, then it becomes translucent and has a luster for thereason that the tan'nin hydrosme rivieri itself became translucent.

In the manufacturing of imitation hemp heretofore, the cotton thread waspassed through a size, and wound firstly on a small reel to be dried. Inwinding on small reel,

small reel. The nap may be laid down by the tannin hydrosme rivieri andit will never nap as there is no adhesion between the threads. I

v the size was pressed out on the surface, hence The tannin hydrosmerivieri has a mordanting property for the basic dy'estufi', consequentlyno mordant is needed in dyeing the thread with the .basic dyestuff.Having now particularly described and ascertained the nature of'mysaidinvention and in what manner the same is to be performed, I declarethat what I claim is g '1. The processfor manufacturing elasticimitation hemp from cotton thread or cloth, consisting of first. coatingthe cotton thread or cloth witha size or paste made from the roots ofthe hydrosme rivieri and thentreating thesame' with tannic acid.

r 2. The process for manufacturing elastic imitatio hemp from cottonthread or cloth, said process consisting" of first coating 'cottonthread or cloth with a paste or. size made from the roots of thehydrosme rivieri, then 3. The process for manufacturing elastic saidprocess consisting of first coating cotton my hand in presence of twosubscribing witghreadhor cloth fwilth I? paste or size made nesses.

rom t e roots 0 t e drosme rivieri, t en treating the same Wi h tannicacid, and TOMOTAKE HONDA 5 finally treating the same with a substanceWitnesses:

which will render it translucent. TSUNEZO Smco,

In testimony whereof I have hereunto set S. SASADA.

